GET /api/dev/progressbar/{taskId}

查询进度条任务状态和进度。

请求示例：

curl -X GET http://127.0.0.1:9527/api/dev/progressbar/pb_1717200000000_abc123 \
  -H "X-API-Key: dk_your_key_here"

响应示例：

{
  "ok": true,
  "data": {
    "status": "running",
    "inputPath": "/Users/test/demo.mp4",
    "outputPath": "",
    "templateName": "鸭鸭进度条",
    "progress": 45
  }
}

任务状态：running → completed / failed。